FIGURE 7 
BOND 4 DIGITAL BRIGHI NESS LEVEL VS. SECCHI DEPTH 
SECCHI DEPTH 
BAND 5 DIGITAL BRIGHTNESS LEVEL , BAND 4 DIGITAL BRIGHTNESS LEVEL 
35.0 
30.0 - 
_ A A A 
_▲ 
25.0 - 
20.0 - 
15.0*— 1 — 1 — L — 1 —I— 1 — 1 — 1 — 1 — 1 —■— 1 — 1 — 1 — 1 — 1 —L-JI—I—l—l I I I I I I till 
•0 5.0 10.0 15.0 20.0 25.0 30.0 
SECCHI DEPTH 
: IGURE 8 — BOND 5 DIGITAL BRIGHTNESS LEVEL VS. SECCHI DEPTH